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FKZQ Aautomatic transfer switch can detect electricity automaticlly, When the City electricity is off working, Genset can be automatically switch on to ensure that critical load of a continuous, reliable operation. The control system uses well-known South Korean brand HangKwang product as the main control switch. Generally It is made by the Automatic Transfer Switch body and Controller . Controller also has two forms: one is the traditional electromagnetic relay ; another is the intelligent digital electronics-based products DCU . It has excellent performance in adjustable parameters, high precision, high reliability and easy operation.